/*
 * Copyright 2010 Pierre Heinzerling, Uwe Janner, Patrick Wright
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.upp.publinksky.operations.theme;

import com.sun.jersey.api.NotFoundException;
import com.upp.publinksky.dao.InvitationDAO;
import com.upp.publinksky.dto.ThemeAndInvitation;
import com.upp.publinksky.model.Invitation;
import com.upp.publinksky.model.Theme;
import com.upp.publinksky.operations.util.ThemeLookup;
import com.upp.publinksky.util.JsonConversion;
import com.upp.publinksky.util.PMF;
import com.upp.publinksky.util.UserUtil;

import javax.jdo.PersistenceManager;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.util.logging.Logger;

/**
 */

@SuppressWarnings({"unchecked"})
@Path("/theme/get")
public class ThemeGet {
    private static final Logger log = Logger.getLogger(ThemeGet.class.getName());

    @GET
    @Path("{id}")
    @Produces(MediaType.APPLICATION_JSON)
    public Response getTheme(@PathParam("id") int themeId) {
        log.info(String.format("retrieving theme with id %d", themeId));
        final String email = UserUtil.getCurrentUserEmail();
        PersistenceManager pm = PMF.get().getPersistenceManager();
        try {
            Theme theme = ThemeLookup.checkedGetTheme(themeId, pm);
            if (theme == null) {
                return Response.status(Response.Status.NOT_FOUND).build();
            }
            ThemeAndInvitation tai;
            if (theme.isOwner(email)) {
                int counter = theme.getOwnerLastRetrievedCounter();
                theme.setOwnerLastRetrievedCounter(theme.getLastUpdateCounter());
                pm.makePersistent(theme);
                tai = new ThemeAndInvitation(theme, null, counter);
            } else {
                Invitation invitation = InvitationDAO.findInvitationToThemeForUser(theme, email, pm);
                if (invitation != null) {
                    int counter = invitation.getLastRetrievedThemeCounter();
                    invitation.setLastRetrievedThemeCounter(theme.getLastUpdateCounter());
                    pm.makePersistent(invitation);
                    tai = new ThemeAndInvitation(theme, invitation, counter);
                } else {
                    throw new NotFoundException(String.format("theme(id = %d): not owner and not invited", themeId));
                }
            }
            String json = JsonConversion.toJson(tai);
            return Response.ok(json, MediaType.APPLICATION_JSON_TYPE).build();
        } finally {
            pm.close();
        }
    }
}